Clutch.



No. 771,771. PATENTED OCT. 4 1904'.

E. DYSTBRUD.

CLUTCH.

APPLICATION Hmm DB0. 2a, ma.

N0 MODEL. 2 BEHEER-SHEET 1.

// www EmiZysiemd ATTORNEYS PATENTED (IGT. 4, 1904.

E. DYSTERUD.

CLUTCH.

APPLIoATxoN FILED Dmza. 1903.

2 SHEETS-SHEET 2.

N0 MODEL.

Patented October 4, 1904.

EMIL DYSTERUD, OF MONTEREY, MEXICO.

CLUTCH.

SPECIFICATION forming part of Letters Patent No. 771,771, dated October4, 1904. vApplication filed December 28, 1903. Serial No. 186,857. (Nomodel.)

.To @ZZ whom t may concern:

Be it known that I, EMIL DYSTERUD, a citi- Zen of the United States, anda resident of Monterey, Mexico, have invented a new and Improved Clutch,of which the following is a full, clear, and exact description.

This invention relates to an improvement in the clutch covered by myprior patent, No. 723,196, dated March 17, 1903.

Broadly, the object of my invention is the same as that set forth in myprior patent; but with the improvement constituting the subject-matterof this application I seek to provide means for more accurately andfully adjusting the parts, and thereby enabling me to time with absoluteaccuracy the positive action of the clutch. By this means I amiable tokeep back the action of the clutch until the motive-power machine hasattained full speed and then allow the clutch to take hold of the loadedpulley or other part with which it is used-a result which cannot beattained by any prior device known to me.

This specification is an exact description of one example of myinvention, while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure 1 is a section of the invention on the line 1 1 of Fig. 2. Fig. 2is a section on the line 2 2 of Fig. 1. Fig. 3 is a sectional detailillustrating the manner of mounting the actuating-spring. Fig. 4 is across-section on the line 4 4 of Fig. 3, and Fig. 5 is across-section onthe line 5 5 of Fig. 1.

10 indicates the revoluble driven member, which may be the shaft of analternating-current motor or any other rotating machine element. Keyedto the driving-shaft 10 is a sleeve 11, carrying at one end aperpendicular web 12 and at the other end a collar 14. Between theseparts 12 and 14 and carried loosely on the sleeve 11 is arranged the hub15 of a pulley, which comprises, in addition to the hub, a web 16 and aface 17. Preferably the parts 12, 16, and 17 are arranged to form, asshown in Fig. 2, a circular case or inclosure, which contains theoperative parts of the clutch. The pulley comprising the parts 15, 16,and 17 constitutes the driven member.

18 indicates a pin carried securely by the web 12 and moving, therefore,as a part of the driving member 12. Mounted on this pin is anintermediately-fulcrumed hollow lever comprising a short arm 19 and along arm 20. The cavities of these arms 19 and 2O communicate with eachother by means of a throat 21 land a by-pass 22,* the throat lyinginward of the by-pass 22, or, in other words, nearer the center of thedriving member 10. 23 indicates a regulating-screw, which works in thewalls of the said hollow lever and controls the by-pass 22. By adjustingthis screw the area of the by-pass may be regulated delicately and atwill.

24 indicates a section of wood or other friction material which isadapted when the long arm of the lever moves outward to engage the innerperiphery of the face 17 of the pulley and grip the same, the part 24forming, therefore, one member of the clutch and the pulley-face theother member. The long arm 2O of the lever curves to conform to the hub15 of the pulley, and 25 indicates a stud carried by the web 12 andserving to limit the inward movement of this arm. l/Vithin the hollowlever I arrange a mass of substance 26,

which may be fluid, semiiiuid, or granulated,

as desired. l prefer, however, to employ mercury for this purpose.

A spring 27 is provided to hold the lever normally in the position shownin Fig. 1. This spring is arranged to encircle a pin 28, which ispivoted at one end to the short arm of the lever and has the other endfreely carried in a guide 29, arranged to turn on a stud 30, carried bythe web 12. It will be seen that by this arrangement the spring actscontinuously on the lever, and the pivotal mounting of the pin 28 andthe turnable mounting of the guide 29 prevent these parts frominterfering with the free movement of the lever.

In the practical operation of the invention, assuming the parts to beconstructed and arranged as shown and the substance indicated 'arm 19,as indicated in Fig. 1.

at 26 to be mercury or its equivalent, when the apparatus is at rest thehollow lever will assume the position shown in Fig. 1 and the mercurywill gather in that part of the lever which may be lowest. The instantrotation begins the mercury will move to that part of the hollow leverwhich is farthest from the center of rotation-viz., into the short arm19 of the lever-the mercury passing principally through the throat 21and collecting in the As the speed of rotation continues the long arm20, having by reason of its length a greater heft than that of the shortarm 19, and the mercury therein will begin to move outward, and as thismovement takes place the mercury will then begin to move through theby-pass 22 and collect along the outer side of the long arm 2O of thelever. This movement of the mercury through the by-pass may beaccurately regulated by the screw 23. The continuallyincreasing speed ofthe driving part will cause the outward movement of the arm 2O and thepassage of the mercury thereinto to continue proportionately to thespeed, and for most effective operation, particularly withalternating-current electric motors, the adjustment of the parts shouldbe such that when full high speed has been reached the whole of the massof mercury 26 will have passed into the long arm 20, and by theincreased heft thereby given to this arm the arm will be forced so faroutward as to clutch the face 24. against the inner periphery of thepulley, and thus connect the driven with the driving element. The partswill then retain this position as long as the predetermined high speedof the driving part continues.

The advantage of the present invention over that disclosed in my priorpatent is that by the use of mercury or its equivalent substance and theemployment of the by-pass 22 and means for varying the area thereof I amenabled to time the movement of the means for automatically increasingthe heft of the lever with absolute accuracy. In this manner I am ableto keep back the operation of the clutch until after full high speed hasbeen attained, and this is of greatest advantage, particularly withalternating current motors, since it avoids. the use of heavystarting-currents. With the clutch-lever moving in the direction of thearrow in Fig. 1 the member 20 when it takes hold on the pulley will bewedged against it and the force of the clutch thereby increased. In thiscase the spring 27 counteracts the strain on the pin 18. rIhe apparatusis simple and effective for the purpose in hand and may be applied atsmall expense to a motor or engine of any sort. In connection with theclutching action it will be observed that the engagement is gradual andeasy, as contradistinguished from a sudden By arrangand thereforeviolent connection.

ing the levers to swing on axes parallel with the shaft I provide acompact and simple structure and take'full -advantage of the centrifugalforce. The drawings show only one lever. In practice this will bebalanced by another or by a suitably-located weight, as will beunderstood.

Various changes in the form, proportions, and minor details of myinvention may be resorted to at will without departing from the spiritand scope thereof. Hence I consider myself entitled to all suchvariations as may lie within the intent of my claims.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination of driving and driven members, anda clutch coacting therewith and comprising a centrifugally-actuatedhollow arm, a substance arranged to move in the arm, and meansprojecting into the interior of the arm for controlling the movement ofsaid substance.

2. The combination of the driving and driven parts, a clutch coactingtherewith and includinga centrifugally-actuated hollow arm formed with athroat and a by-pass therein, and means for regulating the area of thebypass.

3. The combination of a driving and driven part and a clutch coactingtherewith and including an intermediately-fulcrumed hollow lever, thehollow arms of which communicate with each other by means of a throatand a by-pass, and means for controlling the area of the by-pass.

4. The combination of a driving and driven part and a clutch coactingtherewith and including an intermediately-fulcrumed hollow lever, thehollow arms of which communicate with each other by means of a throatand a by-pass, means for controlling the area of the by-pass, and aspring for yieldingly holding the lever in inactive position.

5. The combination of a driving and driven part and a clutch coactingtherewith and including an intermediately-fulcrumed hollow lever, thehollow arms of which communicate with each other by means of a throatand a by-pass, and means for controlling the area of the by-pass, saidmeans for controlling the bypass comprising a screw working in the wallsof the lever and having one end arranged to enter the by-pass.

6. The combination of the driving and driven parts, a clutch coactingtherewith and including acentrifugally-actuated hollow arm formed with athroat and a by-pass therein, and means for regulating the area of thebypass, said means for regulating the area of the by-pass having a screwworking in the walls of the lever and having one end arranged to enterthe by-pass.

7. The combination of driving and driven members and a clutch coactingtherewith and IOO ITO

comprising a eentrifugallyactuated hollow member, a substance arrangedto move in the member, and means within the hollow member forControlling the movement of said substance.

8. The combination of driving and driven parts, a clutch ooactingtherewith and including a centrifugally-aotuated hollow member formedwith a flange and a by-pass therein,

the by-pass lying outward from the flange, and TO means for regulatingthe area of the by-pass.

In testimony whereof I have signed my name to this specification in thepresence of two subsoribing witnesses.

EMIL DYSTERUD, Witnesses:

ISAAC B. OWENS, EVERARD BOLTON MARSHALL.

